<!DOCTYPE html>
<html {{ HTML_ATTRS }}>
  <head {{ HEAD_ATTRS }}>
    {{ HEAD }}
    <link rel="stylesheet" href="/index.css">
  </head>
  <body {{ BODY_ATTRS }}>
    <!-- 渲染的内容最终会注入到这里 -->
    <h1>app.html</h1>
    {{ APP }}
  </body>
</html>
